The phrase "integral element" refers to a necessary or essential part of something. It means that an element or component is crucial and cannot be separated or excluded without affecting the whole. Full definition
As a part of many diverse landscapes, the hoops become integral elements of each location's unique narrative. (nasher.duke.edu)
Resume sections are major integral elements in your resume, all significant, and all useful parts of your competitive resume. (resumewritingservice.biz)
Of course, there will be exceptions — for example, unique displays that would be compromised if integral elements were removed. (petbusiness.com)